Returns a list of users who are muted by the specified user ID.

public func getMutedUsers(for userId: User.ID,
                            fields: Set<User.Field> = [],
                            expansions: [User.Expansions] = [],
                            paginationToken: String? = nil,
                            maxResults: Int = 100
  )

Equivalent to GET /2/users/:id/muting.

• userId: The user ID whose muted users you would like to retrieve.
• fields: Any additional fields to include on returned objects
• expansions: Objects and their corresponding fields that should be expanded in the includes property
• paginationToken: When iterating over pages of results, you can pass in the nextToken from the previously-returned value to get the next page of results
• maxResults: The maximum number of results to fetch.

A Twitter API response object containing an array of User structs and any pinned tweets in the includes property